When you see filenames like keys.dat or prod.keys , they are essentially the same thing: a "digital skeleton key" for your Switch files. To check if they are "correct" for your needs:
To get your setup running "hot" (meaning fully functional and up-to-date), you need to make sure your decryption keys match your firmware. Here is everything you need to know to get it right. What is SAK (Switch Army Knife)?
Your prod.keys file is missing the specific header key for that game. Update your key file. sak are the keysdat prodkeys correct hot
For some conversions, you also need title.keys . While prod.keys decrypts the system, title.keys decrypts the specific games. How to Get Your Setup "Hot"
Ensure the keys are in the same folder as the SAK executable or in the designated /bin or /keys subfolder. When you see filenames like keys
The file might be corrupted. Re-dump or re-acquire the keys.
If your SAK isn't working, it’s usually because the keys are outdated. The most stable way to ensure your keys are correct is to dump them directly from your own hardware using . This ensures that the signatures match your specific files perfectly. Common SAK Troubleshooting: What is SAK (Switch Army Knife)
SAK is an all-in-one GUI tool used by the emulation community to manage Switch files. Its primary job is to convert and compress files—like turning .xci into .nsp or .nsp into .pfs0 .